THE MINERALS OF NEW SOUTH WALES. 199 



Serpentine. 



Chem. comp. : Hydrous silicate of magnesia. 



Of an oil-green colour, semi-transparent, on the Murrumbidgee ; 

 at Bingera, Warialda, Barraba, and Stony Batta. 



Williamsite. — Apple-green, translucent, somewhat greasy to the 

 touch, takes a very fair polish, and forms very pleasing ornamental 

 stone. H. == 3. 



From Tuena. 



Marmolite. — A foliated variety of serpentine, occurs on the 

 Murrumbidgee, of a yellowish colour, associated with dull-red and 

 green serpentine rock. 



The late Mr. Stutchbury mentions the occurrence of an orbicu- 

 lar serpentine on the Apsley, Manning, and Hastings Rivers or 

 Creeks. 



Picrolite. — Chem. comp. : Hydrous magnesium silicate. 



A fibrous variety of serpentine. Found at Kelly's Creek, 

 Gwydir Biver, and in the serpentine at Bingera, with meerschaum. 

 It occurs also as a green striated mineral at Lucknow and Went- 

 worth near Orange. 



Talc. 



Chem. comp. : Hydrous magnesium silicate. Hexagonal system. 



Occurs in the form of hexagonal crystals between Gudgeby 

 Biver and ISTaas Valley, also about Bathurst. And from Junge- 

 monia to Uranbeen with steatite and large hornblende crystals. 



Steatite. — A massive indurated form of talc or hydrous magne- 

 sium silicate. 



Occurs in Banger's Valley, Severn Biver, at Elsmore, and the 

 Bolitho Tin Mine, associated with tinstone. At Jungemonia and 

 Uranbeen, Icely. 



Soajpstone, Saponite. — Williams Biver, Icely. 



Agalmatolite, or Chinese Figure Stone — In chlorite schist. 

 Nurembla, Callalia Creek. 



Meerschaum. — Chem. comp. : Magnesium silicate. Said to occur 

 on the Bichmond Biver. Very doubtful. 



Augite Group. 



Augite. 



Pyroxene. — Chem. comp. : Silica, magnesia, iron, lime, &c. 

 Oblique system. There are several varieties of olivine, which 

 range from white or almost white to dark green, black, and opaque 

 minerals. 



